全文获取类型
收费全文 | 2204篇 |
免费 | 92篇 |
国内免费 | 27篇 |
专业分类
耳鼻咽喉 | 49篇 |
儿科学 | 41篇 |
妇产科学 | 42篇 |
基础医学 | 185篇 |
口腔科学 | 66篇 |
临床医学 | 152篇 |
内科学 | 742篇 |
皮肤病学 | 8篇 |
神经病学 | 120篇 |
特种医学 | 74篇 |
外科学 | 291篇 |
综合类 | 7篇 |
一般理论 | 1篇 |
预防医学 | 41篇 |
眼科学 | 4篇 |
药学 | 93篇 |
中国医学 | 2篇 |
肿瘤学 | 405篇 |
出版年
2023年 | 12篇 |
2022年 | 39篇 |
2021年 | 55篇 |
2020年 | 28篇 |
2019年 | 41篇 |
2018年 | 64篇 |
2017年 | 31篇 |
2016年 | 58篇 |
2015年 | 63篇 |
2014年 | 59篇 |
2013年 | 63篇 |
2012年 | 153篇 |
2011年 | 161篇 |
2010年 | 85篇 |
2009年 | 58篇 |
2008年 | 101篇 |
2007年 | 114篇 |
2006年 | 110篇 |
2005年 | 144篇 |
2004年 | 115篇 |
2003年 | 128篇 |
2002年 | 105篇 |
2001年 | 52篇 |
2000年 | 54篇 |
1999年 | 29篇 |
1998年 | 16篇 |
1997年 | 21篇 |
1996年 | 16篇 |
1995年 | 10篇 |
1994年 | 18篇 |
1993年 | 18篇 |
1992年 | 33篇 |
1991年 | 21篇 |
1990年 | 22篇 |
1989年 | 33篇 |
1988年 | 30篇 |
1987年 | 18篇 |
1986年 | 14篇 |
1985年 | 16篇 |
1984年 | 20篇 |
1983年 | 6篇 |
1982年 | 7篇 |
1981年 | 7篇 |
1979年 | 6篇 |
1977年 | 6篇 |
1976年 | 5篇 |
1973年 | 6篇 |
1972年 | 5篇 |
1971年 | 10篇 |
1969年 | 4篇 |
排序方式: 共有2323条查询结果,搜索用时 15 毫秒
61.
Hiroki Takeshita Daisuke Ichikawa Shuhei Komatsu Takeshi Kubota Kazuma Okamoto Atsushi Shiozaki Hitoshi Fujiwara Eigo Otsuji 《World journal of surgery》2013,37(12):2891-2898
Background
This study was designed to determine the surgical outcomes of gastric cancer in elderly patients. This information can help establish appropriate treatment for these patients.Methods
A total of 1,193 patients with gastric cancer who underwent gastrectomy between 1995 and 2010 were enrolled in this retrospective study. The clinicopathologic features of 104 elderly patients (aged ≥80 years) were compared with those of 1,089 nonelderly patients.Results
(1) Tumors located in the lower-third of the stomach, differentiated cancer, and surgery with limited lymph node dissection were more common in elderly patients. However, there was no difference in the proportion of laparoscopic gastrectomy between elderly and nonelderly patients. (2) Although surgical complication rates were similar in the two groups, the operative mortality rate was higher in elderly patients (1.9 %) than in nonelderly patients (0.7 %). (3) Elderly patients had a significantly poorer overall survival rate, whereas the disease-specific survival rates of the two groups were similar. Limited lymph node dissection did not influence the disease-specific survival rate of elderly patients. (4) The median life expectancy of elderly gastric cancer survivors was 9.8 years in patients aged 80–84 years and 6.0 years in those ≥85 years. The patients with limited lymph node dissection had slightly better prognosis.Conclusions
The treatment results in elderly patients were comparable to those in nonelderly patients. These findings suggest that R0 resection with at least limited lymph node dissection according to Japanese guidelines should be considered, even for elderly patients. 相似文献62.
Makoto Orii Kumiko Hirata Takashi Tanimoto Shingo Ota Yasutsugu Shiono Kunihiro Shimamura Kohei Ishibashi Takashi Yamano Yasushi Ino Hironori Kitabata Tomoyuki Yamaguchi Takashi Kubo Toshio Imanishi Takashi Akasaka 《Journal of Echocardiography》2013,11(2):69-71
A 56-year-old female was admitted to our hospital because of respiratory symptoms. Her admission ECG showed normal sinus rhythm and standard echocardiographic evaluation showed no structural or functional abnormalities. She was diagnosed as having sarcoidosis by imaging modalities and mediastinum lymph node biopsy. In this case, 2-dimensional speckle-tracking echocardiography (STE) demonstrated abnormal regional myocardial function and delayed enhancement cardiac magnetic resonance imaging revealed a high intensity area in the same segments. This case suggests that STE is potentially useful for the detection of cardiac sarcoidosis in the early phase. 相似文献
63.
Kazuma Sasamura Hiroko Ohki‐Hamazaki Izumi Sugihara 《The Journal of comparative neurology》2013,521(14):3321-3339
The projection pattern of the olivocerebellar (OC) axons, which terminate mainly as climbing fibers (CFs) in the cerebellar cortex, tightly reflects the compartmental and developmental organization of the cerebellum as revealed by mapping and reconstruction studies in the rat. The avian cerebellum is well lobulated and longitudinally compartmentalized like the mammalian cerebellum. However, the projection pattern of the OC axons has not been studied in detail for most areas of the avian cerebellum. In the present study, we reconstructed labeled chick OC axons resulting from a small focal injection of biotinylated dextran amine into the inferior olive to investigate their morphological characteristics, and to determine their relationship to the general morphology of the chick cerebellum. Labeled CFs were distributed basically in a single longitudinally elongated narrow band‐shaped area in lobules I–VIII, but in multiple, transversely widened, band‐shaped areas in lobules IX–X. Three of the four reconstructed OC axons terminated in a single longitudinally band‐shaped area in lobules IXa–c, whereas the other one terminated in multiple mediolaterally separated areas in lobule IXc, which is part of the flocculus. Single OC axons branched into 14 CFs on average. Two CFs occasionally merged to form a single terminal arbor. Axons also had thin, non‐CF collaterals that projected either to a cerebellar nucleus or to the cortex. The results indicate that the morphological characteristics of OC axons, including branching and termination, are basically conserved between the chick and the rat. J. Comp. Neurol. 521:3321–3339, 2013. © 2013 Wiley Periodicals, Inc. 相似文献
64.
The purpose of our study was to evaluate the effects of surface modifications on the bond strength between veneering porcelains and Yttria-stabilized tetragonal zirconia (Y-TZP). In a bond strength tests, the effect of control, 70 μm alumina-sandblasting, 30 μm and 110 μm silica-coating of the Y-TZP surface on bonding were evaluated with veneering porcelains. In addition, the effect of surface modification on the flexural strength of Y-TZP was also evaluated. The data was analyzed using one-way ANOVA and Tukey test. All specimens showed bond strength values in excess of 25 MPa, the minimum allowed by ISO9693. In addition, significantly differences were found between the control and the 30 μm silica-coated. On the other hand the flexural strength of Y-TZP does not significantly difference for any surface modification. These results indicate that silica-coating may provide an effective pre-treatment for this enhancement of the bond strength while maintaining the strength of Y-TZP. 相似文献
65.
Toshihisa Takeuchi Takahisa Furuta Yasuhiro Fujiwara Mitsushige Sugimoto Kunio Kasugai Motoyasu Kusano Hiroyuki Okada Takahiro Suzuki Tomohiro Higuchi Takuma Kagami Takahiro Uotani Mihoko Yamade Akinari Sawada Fumio Tanaka Satoshi Harada Kazuhiro Ota Yuichi Kojima Masaki Murata Yasuhiro Tamura Yasushi Funaki Osamu Kawamura Yuki Okamoto Kazuma Fujimoto Kazuhide Higuchi 《Alimentary pharmacology & therapeutics》2020,51(5):534-543
66.
Ishizaki Atsushi Mishiro Kenji Shiba Kazuhiro Hanaoka Hirofumi Kinuya Seigo Odani Akira Ogawa Kazuma 《Annals of nuclear medicine》2019,33(4):244-251
Annals of Nuclear Medicine - Somatostatin receptors are highly expressed in neuroendocrine tumors, and many radiolabeled somatostatin analogs for diagnosis and treatment have been developed. To... 相似文献
67.
Takayanagi Mizuho Kawasaki Yoko Shinomiya Mieko Hiroshi Hoshino Okada Satoshi Ino Tamiko Sakai Kazuko Murakami Kimiko Ishida Rie Mizuno Kaoru Niwa Shin-Ichi 《Journal of autism and developmental disorders》2022,52(1):240-253
Journal of Autism and Developmental Disorders - This study was a systematic review of research using the Wechsler Intelligence Scale for Children (WISC) with Autism Spectrum Disorder (ASD) to... 相似文献
68.
Hiroshi Doi Kazuhiro Kitajima Kazuhito Fukushima Yusuke Kawanaka Miya Mouri Satoshi Yamamoto Reiichi Ishikura Tomonori Terada Kazuma Noguchi Shozo Hirota 《Japanese journal of radiology》2016,34(5):349-355
Purpose
Our aim was to determine whether the maximum standardized uptake value (SUVmax) of the primary lesion demonstrated by [18F]-fluoro-2-deoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) is associated with the prognosis of maxillary sinus cancer.Materials and methods
The relationships of clinicopathological factors including age, T stage, N stage, histologic type, treatment strategy, and primary tumor SUVmax with progression-free (PFS) and overall (OS) survival were evaluated using the log-rank test and Cox method in 31 patients with maxillary sinus cancer before combined superselective intra-arterial chemotherapy using high-dose cisplatin with concurrent radiotherapy, or radiotherapy alone.Results
The median duration of follow-up was 55.4 (range 9.7–72.6) months. PFS and OS of patients exhibiting a high SUVmax (≥16 and ≥17, respectively) for the primary tumor were significantly lower than those of patients for whom the primary tumor SUVmax was low (p = 0.0010 and p = 0.033, respectively). Multivariate analyses showed that T stage (p = 0.0049) and primary tumor SUVmax (p = 0.026) were independently prognostic of poorer PFS and that only primary tumor SUVmax (p = 0.049) was independently prognostic of poorer OS.Conclusion
SUVmax of the primary tumor determined by FDG-PET/CT before treatment could be a good surrogate marker for prognostication of maxillary sinus cancer.69.
Differential effects of adipose tissue stromal cells on the apoptosis,growth and invasion of bladder urothelial carcinoma between the superficial and invasive types 下载免费PDF全文
70.
Risk Factors for Early Recurrence of Single Lesion Hepatocellular Carcinoma After Curative Resection
Mitsugi Shimoda Kazuma Tago Takayuki Shiraki Shozo Mori Masato Kato Taku Aoki Keiichi Kubota 《World journal of surgery》2016,40(10):2466-2471